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bonding: use bond_set_slave_arr to simplify code 

In bond_reset_slave_arr(), values are assigned and memory is released only
when the variables "usable" and "all" are not NULL. But even if the
"usable" and "all" variables are NULL, they can still work, because value
will be checked in kfree_rcu. Therefore, use bond_set_slave_arr() and set
the input parameters "usable_slaves" and "all_slaves" to NULL to simplify
the code in bond_reset_slave_arr(). And the same to bond_uninit().

Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Zhengchao Shao 2023-08-10 21:50:06 +08:00 committed by David S. Miller
parent cc317ea3d9
commit a8f3f4b448
1 changed files with 2 additions and 25 deletions
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27
drivers/net/bonding/bond_main.c
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@ -5046,19 +5046,7 @@ static void bond_set_slave_arr(struct bonding *bond,
static void bond_reset_slave_arr(struct bonding *bond)
{
struct bond_up_slave *usable, *all;
usable = rtnl_dereference(bond->usable_slaves);
if (usable) {
RCU_INIT_POINTER(bond->usable_slaves, NULL);
kfree_rcu(usable, rcu);
}
all = rtnl_dereference(bond->all_slaves);
if (all) {
RCU_INIT_POINTER(bond->all_slaves, NULL);
kfree_rcu(all, rcu);
}
bond_set_slave_arr(bond, NULL, NULL);
}
/* Build the usable slaves array in control path for modes that use xmit-hash
@ -5951,7 +5939,6 @@ void bond_setup(struct net_device *bond_dev)
static void bond_uninit(struct net_device *bond_dev)
{
struct bonding *bond = netdev_priv(bond_dev);
struct bond_up_slave *usable, *all;
struct list_head *iter;
struct slave *slave;
@ -5962,17 +5949,7 @@ static void bond_uninit(struct net_device *bond_dev)
__bond_release_one(bond_dev, slave->dev, true, true);
netdev_info(bond_dev, "Released all slaves\n");
usable = rtnl_dereference(bond->usable_slaves);
if (usable) {
RCU_INIT_POINTER(bond->usable_slaves, NULL);
kfree_rcu(usable, rcu);
}
all = rtnl_dereference(bond->all_slaves);
if (all) {
RCU_INIT_POINTER(bond->all_slaves, NULL);
kfree_rcu(all, rcu);
}
bond_set_slave_arr(bond, NULL, NULL);
list_del(&bond->bond_list);